The Bookmark is an online bookseller. When books are purchased, the shipping fees are added to the price. The table shows how sh
ipping fees are calculated. Purchase Total Less than $20 $20-$34.99 $35-$49.99 Greater than $50 Shipping Fees 3% of total 4% of total 6% of total 8% of total Sonja bought 3 books priced at $11.35, $9.50, and $14.70. Part A Determine the shipping fees for Sonja's order. Round the answer to the nearest hundredth if necessary. $ Part B What is Sonja's total cost including shipping? IOT Ha E
1 answer:
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Answer:
Step-by-step explanation:
step 1
we have the points
(-1,0), (-2,0), and (0,2)
Plot the points
using a graphing tool
see the attached figure
The graph of a quadratic function must be a vertical parabola open upward
The vertex is a minimum
The quadratic function in general form is equal to
Substitute the value of x and the value of y of each given ordered pair in the general equation and solve for a,b and c
(0,2)
For x=0, y=2
substitute
(-1,0)
For x=-1, y=0
substitute
---->
----> equation A
(-2,0)
For x=-2, y=0
substitute
----> equation B
we have the system
----> equation A
----> equation B
substitute equation A in equation B
solve for b
Find the value of a
therefore
The quadratic function in general form is equal to
see the attached figure N 2 to better understand the problem
